Source for replacement caps in H744 regulators - test-drb@ccmp.vtda.org

6 Jan 2022

It would be a lot easier to replace the large circular regulator if you're
taking the shotgun approach, and much more likely that the regulator is a
source of faults.  and it's cheaper.  For the h744, 45, 54.  BUT measuring
things is the best way if you can do it.   Pull the values from the
backplane, there are test points that you can measure from.
Bill
On Thu, Jan 6, 2022 at 2:30 PM Wayne S via cctech <cctech at classiccmp.org>
wrote:
...
  So you want to replace capacitors just because they
?whine? ?
 I?ll say that because you are learning, that is not good troubleshooting
 practice.
 Make a checklist of troubleshooting power supplies.
 There are a lot of good youtube videos  and other internet information  on
 how power supplies work, how to check them and repair them. There is danger
 when working  with power supplies.
 When working on electrical equipment do you know about the  ?working with
 one hand in your pocket rule?? Doing this stuff, videos and reading, is not
 overly time consuming and may save your life!
 Sent from my iPhone
  On Jan 6, 2022, at 07:50, Jon Elson via cctalk
<cctalk at classiccmp.org>  wrote:

 ?On 1/6/22 2:52 AM, Rob Jarratt via cctalk wrote:
> I think I may need to replace the two output capacitors in some of my  H744
 > regulators. These are screw terminal 6,000uF
10V parts. I have looked on
> Mouser, Farnell and Digikey and there don't seem to be any available,  and
   any that
are listed are really rather costly.
 Does anyone know where I might find some, preferably from a reputable
 supplier. Note that I am in the UK.

 Mouser is a good place to find big caps (or at least used to be).  You  might have
to get "snap in" caps and solder wires to them, that style seems
 to be more available.

 Jon